Why would you want to ruin the elegance of your Apple iPhone 4 by putting on bulky, ugly silicon jacket, or thick colorful tacky cases? You wouldnt, you want to protect your iPhone while maintaining its original grace without adding on more weight or size. This Ultra Thin iPhone jacket provides protection for your iPhone without the bulky look. It is super thin and less than 0.1oz, but made with unique flexible plastic so it doesnt crack like an egg like all the other bulky crystal case. This is a case you have to use if you like how your IPhone looks, but wants to protect it without ruining its original grace. Compatible with AT&T and Verizon iPhone 4, AND AT&T, Verizon and Sprint iPhone 4S.